What is the normal range of rainfall?

What is the normal range of rainfall?

The rainfall is classified as excess, normal deficient or scanty as per the following criteria. Excess +20% of normal or more, ‘Normal: + 19% to -19% of normal, Deficient -20% to -59% of normal, Scanty: -60 % of normal or less.

What is median rain?

The median, or decile 5, rainfall is that value which marks the level dividing the ranked data set in half; i.e. the midpoint of the ordered (lowest to highest) monthly or yearly precipitation totals.

Is 2.4 mm rain a lot?

Moderate rain: Greater than 0.5 mm per hour, but less than 4.0 mm per hour. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. Slight shower: Less than 2 mm per hour. Moderate shower: Greater than 2 mm, but less than 10 mm per hour.

What does range of rainfall mean?

The range of the data is the difference between the largest and the smallest values. In other words, if the difference between the scores of the month with the highest average rain fall and the month with the lowest average rain fall.

What is the average rainfall in mm?

The globally averaged annual precipitation over land is 715 mm (28.1 in), but over the whole Earth it is much higher at 990 mm (39 in). Climate classification systems such as the Köppen classification system use average annual rainfall to help differentiate between differing climate regimes.

What is considered a high annual rainfall?

Rain forests are characterized by high rainfall, with definitions setting minimum normal annual rainfall between 1,750 and 2,000 mm (69 and 79 in).

How do you read average rainfall?

Add together all of the monthly rainfall totals in your sample data. You’ll be adding measurements in inches because rainfall is generally measured in inches in the United States. Divide by the number of years in your data set to arrive at the average monthly rainfall for any location.

What does 0.01 inches of rain look like?

Rain Amount Guidelines 1/100 (0.01) of an inch of rain – The first measurable amount of rainfall reported by The National Weather Service. This would not leave puddles on the ground and would slightly wet the surface. This might occur during a light shower for 2-5 minutes or even a drizzle for 2 hours.

What does it mean to have a medium range weather forecast?

Medium-Range Forecasting: Sticks in a Stream. Medium-range forecasts in fast-flow patterns during the cold season are particularly prone to error. These forecasting limitations are especially true in medium-range forecasting (the medium range generally represents three to seven days in the future).

When to look at the range of rainfall?

It can also be useful, particularly at times such as autumn when seasonal forecast models show low predictability, to look at what history says about the typical range of rainfall values for the remainder of the year or season.

What’s the difference between 1 mm and 1 litre of rain?

This is why you can write “1 mm of rain” instead of “1 litre of rain per square metre”. They are equivalent. For your specific question: 10 mm of rain means 10 litres per square metre. What’s the actual meaning of 2mm of rainfall on weather forecasts?

What does 8 mm to 10 mm rainfall mean in layman terms?

It really depends on the local climate, but 8 to 10 mm of rainfall in one day would be a light rain event in most places where it typically rains. Spread out evenly over a 24-hour period, that amount is fairly typical for a continuously light-to-moderate rainy day where you definitely want your umbrella but it’s otherwise unremarkable.